Furnace regulation



1943- J. J. KLINKER 2,326,230

FURNACE REGULATION Filed Sept. 10, 1941 (fa/11v 1" fax/viva? mean/M nergized; the regulator willgbe Iriagnetically actuated "switch 53,' lhis switch is providedtwith a. 'coil jihand the parts are so arranged; thatzupon energizati on off thi's 'c'oil the I switchiwillbe closed'andfthe niotor l 4='will' start.

-I niorder to., control the operation or the various :parteqin a 'desired manner, I i prefer to 11tili ze.{a time 'delay relaycomprising a coil :56 arran ed ,toEfaLctuate three-kswitches 51; 58" an'cl i-59'. i The I switchil isrofithe double thr'ow itype, the switch 58i'is'normall3'tcldsed, and thejs witch 59 i norg *mally, open The relay furtheri'comprises a nor mallirfope' thermostatically "actuatedswitch 6! f havingamimetalstripfiz'eandaxheating co'il:53.' The electrical supply 25 I ;is shown as three-phase; and. in "the illustrated embodiment ione "phase of: this supply-is utilized fori'ener'gizati'oneof the sev- I eral coils and solenoids, but it;.;will beapparent yfthatjanjentirely separatepowerjisourhe. maybe employed 'i fudesired. ,It Wi11I berI10td that the masteliswitch {Fhe' thermostatic switch 61' and due.

. .t tien of h t er- 1 r P r =-v Ientfron ithe'ahoye disclosure, Assurning that i 9 thest em Pr ssur i sueamm hi hrt ery re I *-ious parts will he positionedias'illustrateda The maSter.,-sW itch --flfIwill:be open all the coilsfind W li izd. ne e zed t w t h .531 wi l v I I and-the burner '12 will; be shut down. a r The regulator; 21 'w 'ilLbe c nnected to the outlet .5, jam; 'Since'fthe pressu e vinjthis, duct: is lowe tuart thatjor' whichfthferegulator isfad 111 ,75. d u at t wil e un a anced n uch I a direction 'as't'o hold the damper] Bjclpsjed LThus'. wasteful flow' of cool airgthrough thefurnace and .boiler will, be prevented; If' nowthe'1steam pre f sure }shou1d drop sufiici'ently to {close the master j i W switch 41:, thih'eati'nfg cdil fiii and the solenoid 4ft 0 will'i'both" be.;ei1e'rg-ized-. Thls will-.1 start l the} heat-Q i' ng .o the bimetal stripfiland atlthe samtime the atmospheric Yent 382Wi11'xbe opened. -:-.f Thus fthe' rez ulatolrfl willbe subjected to a pressure I I a e member. will close the port 42, and when the isolenoid is deenergized the valve niember will n close the port 43. 'I hepo'rt 'Hconnectsthe pipe v *13I with the pipe 34, while the port 43 connects the 7 j pipe53lwiththepipe 35; With thiscconst'ruction' I ai clboth solenoids deenergi'zeitheregulator will be connected'with the 'outlet'duct l6,'-and-"the --d amper.l8 willgbe closed as i1lustrated. If the- V I solenoid, j4'fl I I u connected toatmosphere,andthe damper; 18 will I be opened wide. If thesolenoicl 45 is energized andthet solenoidlfldeenergiaed; the regulator will be connected to the furnace chamber l emme 7 damper 18f Will be controlled to maintainjthe desired furnace draft. 1,1 lj; 'Tf The bu fn er -motor I4 started-and stopped :automati cally' in accordance with the, demand for I heat. For-this purposel havesliown -a pressura actuated master switch 41 of Ithe we11-known,;' mercury-tube t pe connected by a pipe 48 'tothe' I steam delivery pipe S ot-Q thefboiler l5 and-: ar-' {predetermined gmmimu steam- ;pressure; andto openata predeterminedmaximum'steam pressure. Themotor'l lis c'on I nectegi to a suitable eleetrieal supply-5 flay-means I oi conductors 52: which leadithrough an electr0+ reater tha njthat for which itQI'S- adjusted; ,and I it will accordingly be unbalanced" in the opposite 'direction and start to, open thedamper I 8. After.

a briefinterval sufficient for the damper to reach. -its open-or. nearly open position, the bimetal'strip will become'hot' enough to clos'eithe' sw itch36] and, energize the "coil 56.; 'f This. will raise the switchesi'5l 58; and 59,,deenergizing the coil63 and solenoid fltgfand energizinggthe coil 54; and" o1e'noidf45. The"switch'-5]Zwil1 shunt the switch a 5 I and: thus maintain energization of [the .coil 56 "despite the-cooling ofthe'birnetaljsitripjiih 'The I i: switch .53 will'be closed, starting the" burnermotor |4, I,and the conihustionofthelfuel will begin. S'n'ice thejdampferjl8 is open; no fiare- -backs will "occurF-The yalve "ports ,43 and 31 will be opened,

connecting the regulator iii-With the furnacejl'l, r ahdI- -the regulator :willthereupon' control the damper-.18 in sucha 'way'as to maintain a'prede; termined furnace. draft andensure ajpredetermined iilel air ratio. Asth'este'am pressureonce more reaches 'theipoint requir'edto opens-the mas-, terswitch 4.1; ,the'coil; 56' wi-l1 be 'deenergized, the

7 switch 59,will open,'deen ergizing the @011154' and the-solenoid; {The switch..53 will open, stoppingrthe-burner;motor;;l4. Theregulator 2Iliwill '5 again be connected toi theoutlet duct =l6, --and he d mne alfi, w l ibe' qsed-once more to. preent air flow through the furnace and b oiler. It will 'be reGQgni z edthat many changes and variations maytb made in the construction and arr angement of the 'yariousparts without departg the'ilcqil; 56' are :connected' in lseries;; Also,:-the master=switch4],;the switch 58 iandithe-solenoidillgareponnected in:'seri e S., .Theaswitchilnor l I mallxconnect ;the master switch I lIJQjSBIiGS wi ththeheating coili63;butwhenthe switch 51 L islr aifiefikzit s nts h .=;th 0staticswit h 6 to the, iu r acetpress me. irqm h s it 0f the n en a d e- 'fore it is intendedto include allsuch chang es endr-i er a ien wi in he ic e f, ollow ne j claims; v I v I I I 1: A 0 1 SUPD' S i Ii I to 'st'artandlstop 'the'gvfuel "upp" 'means in ac- CordanCe wltIi the demise a seem; arranged to c0ntr olrthe means is-operating, thejrregillator' 2 the" regulator tofclos'e the.;darnper,

' regulator to 2. control'systemrora :furnace havin uel u r r ei we ampere-tome he i v f charge of" the gaseous productsz ofgcomjcustiOn f m t e u a c a si iies' e ni ia ti t m stop the fuehsuppl'y means'in accordance with I the ldemand' for] heat,- a. regulator: arranged to controlathe;damperilandresponsrie to the i'urnace gpre'ssuife'ilw'hile 'the fuel supply meansis operating; 'their'e'g'ulatorfpeing. adjusted a predetermined si ibeatrfiosphric j ressura means ,tosubject the regulatorrtb' a higher pressurefor ashdrt t me just prior t0 each starting of the fuehsupplimean's andthus'f causefthe regulator v rije jfmeensp s bjec t r a a we ii svrefiwhe e-ri al supply'r'neans isstoppedjand thus causelt he re -1 70 9? W s? h am e --i3fA '-cont1 ol systemfoi a furnacehairing fuel.

Supply a duct orth nar e of-flie gaseous i products of cornbustidrif from the fur nace, and ae -fdamper in th -duct' comprising 75.

means to startfl'and sto-plthe :fuelsupply means 151 a sy for having fj el duct, forathe discharge 'ol' the gaseous' products.roflconibustion'iron rthe fu f e a enens if u J edi r i' p' e rm ned" b t sriem esr' sure, 'andLmeans to subject "the regulator to the pr essure i n athe duct beyond thefldamper whe'n'j' 7 in accordance with the demand for heat, a regulator arranged to control the damper and responsive to the furnace pressure while the fuel supply means is operating, the regulator being adjusted for a predeterminedsub-atmospheric" ,pressure, means to subject the regulator to atmospheric pressure for a short timejustprior to each starting of the fuel supply meansand thus cause the regulatorto open the damper, and means to subject the regulator to thepressure in the duct beyond thedamper when the fuel supply means is stopped and thus cause the.

regulator to close the damper. I I

4. A control system for a furnaceflhaving fuel supply means, a duct for the discharge of the regulator arranged to. control the damper and adjusted for a predetermined sub-atmospheric pressure, a time-delay relay, means to initiate operation of the relay and to subject the regula- V l tor to atmospheric pressure in response to a'dee mand for heat, means responsive to completion 'of the relay operation to start operation of the '1 fuel supply means and to subject the regulator I to the furnace pressure, and means responsive 'to lack of demand for heat to stop operation of thejfuel supply means and to subject the regulator to the pressure in the duct beyond the damper.

5. A'control system for a furnace having'fuel supply means, a duct for fthe dischargesofthe gaseous products of combustion fromithe furnace, and a damper in the :duct comprising a regulator arranged to control the damper and adjusted for a predetermined sub-atmospheric pressure, valve mechanism whereby the regu- V '15 gaseous products of combustion from the furnace, and a damper in theduct comprising a lator may-be connectedselectively-to the'fur-V nace, to the atmosphere or to the duct beyond ate operation of the relay and actuate the valve ii mechanism to connect the regulator --,to- (the the dampenia time delay'relay', means'to,

atmosphere in response, to a demand foriheat, i means responsiveto1-the completion1 of. the relay operation to start .operation'ofthe-fu'el sup- 3 ply means and actuatethe valvemechanismto 'connectthe regulator'tothefurnacaandmeans; responsiveto lack"of demand for heat to stop operation ofrthe fuel supply means'and actuate the valve mechanism to connect the regulator to the duct beyondthe damper. 1; r 6. A control system for a furnace having fuel supply means, a duct for the discharge of" the gaseous products of 1 combustion from the furnace,. and a damper in the duct comprisingv a regulator arranged to control the damper and adjusted -for a "predetermined sub-atmospheric solenoidl operated three-way valves, the first valve-being operable to connect the regulator selectively to either the atmose Y 7 phereor-the'second valve, and thesecond valve pressure, two

being operabIeQtO connect the firstvalve to either the furnace or the duct beyondthe damper, a time delay relay, meansresponsiveto}a i demand for heat to initiate operation of therelay and actuate the-first-valve5tq connect the regulator to j the atmosphere, mea'ns responsive valve with the duct beyond the damper},-

1 ome; KmNKf R i 1 

